| Parameter | Post-Fix Measurement | Improvement | | :--- | :--- | :--- | | | 102.4 dB (1W/1m) | +1.4 dB over original | | Impedance minima | 6.8 Ω @ 120 Hz | Stable | | Low-frequency extension | 32 Hz (-3 dB) | Better than original (38 Hz) | | High-frequency extension | 22 kHz (-3 dB) | Extended 2 kHz | | Max SPL (clean) | 121 dB peak | No distortion up to 110 dB continuous |
| Metric | Wrong "AT40" Spec | Factory Faulty Unit | | | :--- | :--- | :--- | :--- | | Max clean SPL (1m) | 102 dB | 98 dB (tweeter choked) | 114 dB | | Tweeter cutoff | 3,200 Hz (too high) | 1,800 Hz (too low) | 2,500 Hz (optimal) | | Bass extension (F3) | 55 Hz | 45 Hz | 38 Hz | | Impedance min | 7.2 ohms | 6.8 ohms | 5.9 ohms (stable) | cerwin vega at40 specs fix
| Parameter | Measurement | | :--- | :--- | | | 3-way, ported | | Woofer | 10" (Part # 1214 or similar stamped frame) | | Midrange | 4" paper cone (sealed back) | | Tweeter | 1" Polycarbonate dome | | Power Handling | 150 Watts RMS / 250 Watts Peak | | Impedance | 8 Ohms (nominal) | | Sensitivity | 96 dB @ 1W/1m (Very efficient) | | Frequency Response | 32 Hz - 20 kHz (usually -3dB at the low end) | | Crossover Points | ~500 Hz, ~4 kHz | | Enclosure | Vented, rear-firing port | | Dimensions | 36" H x 13" W x 12" D | | Parameter | Post-Fix Measurement | Improvement |
For over six decades, Cerwin Vega has been synonymous with one thing in the audio world: The slogan “Hear the Boom, Feel the Boom, See the Boom” isn’t just marketing; it is an engineering mandate. Among their most beloved vintage offerings is the Cerwin Vega AT-40 (often typed as AT40). The mythical "AT40" often refers to a misprint
A significant discrepancy exists in user-circulated and some third-party specification sheets for the Cerwin Vega AT series. The mythical "AT40" often refers to a misprint of the AT-10 or a misreading of the cabinet code. This paper provides the for the Cerwin Vega AT-10 (12" woofer) and outlines a hardware fix for the common under-specification of the tweeter protection capacitor.